Durante la época de la Revolución Mexicana, en un pueblito minero de estado de Guanajuato vivía un niño de once años al que todos llaman "Gapo". A raíz de un suceso inesperado, decide ir en busca de su hermano mayor "El Damián", un héroe revolucionario. Pero no viajará solo, con él irá Juan Escopeta, pistolero a sueldo con una misión crucial en la historia.
Durin the Revolution War in Mexico, in a little town in the state of Guanajuato there was an eleven year old boy nicknamed "Gapo". It was due to an unexpected event, that he is forced to look out for his older brother "El Damián", a revolutionary hero. But he does not travel alone, because "Juan Pistolas", an assasin for hire will tag along with him on his journey with a special mission.